Select from One word to another

[mattress58]

My current code is below and works, but I need to change it some. I dont want to select for one value to another, I need to select all "YDF" in column E. (They will all be right after each other)

[ragulduy]

Maybe something like:

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Which will find the first and last occurence of "YDF", therefore it assumes that there will be no other occurences in the rest of the column.